Magnifying Visors

How come if you look in a magnifying glass far enough away, the thing your looking at turns upside down?

It's weird. One day I looked at my friend with one with the magnifying glass far away and he was upside down. Why?

Public Comments

1. the light rays in a concave lens only produce an upright image for a certain distance before they show an inverted image. a diagram would explain it more clearly